What neurotransmitters are most likely in undersupply in someone who is depressed? a. dopamine and gaba b. ach and norepinephrine c. dopamine and norepinephrine d. serotonin and norepinephrine e. serotonin and glutamate?

The most appropriate answer would be d. Serotonin and norepinephrine

The mechanism that cause depression is not clear, but it is known that the patient has lower level of serotonine, norepinephine and dopamine. The primary drug used for depression is selective serotonine reuptake inhibitor(SSRI), so you could infer that serotonine level is lower in those patient. There is also serotonine norepinephrine reuptake inhibitor(SNRI) drug used for depression.

b is the best answer for this question.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation: